Prognostic role of levels of extracellular histones H3 for diagnosis of early dysfunction of transplant after hepatic transplantation
Objective. The aim of this study was to determine the prognostic role of extracellular histones in the diagnosis of early graft dysfunction after liver transplantation..
Materials and methods. The 93 recipients undergoing LDLT were enrolled in this prospective study. Blood samples of patients were collected on postoperative day 1 and histone levels in the plasma samples were measured with Total Histone H3 sandwich ELISA kits. 19 (20.4%) subjects had early graft dysfunction (EAD) which was diagnosed on postoperative day 7 according to Ol-thoff’s criteria, based on liver function tests and coagulation profiles. Other 74 (79.6%) recipients did not have EGD.
Results. Levels of circulating histones were depressed in patients with EGD (0,808±0.026, 95% (CI) 0.752-0.864) than in patients without EGD (0.820±0.017, 95% (CI) 0.786-0.854) (P=0.727). These differences were not significant. The sources of histones in the circulation are not etiologies specific and levels of total histone H 3 after 24 h of operation had not stronger predictive value with AUC 0.477 (95 % CI 0.329 to 0.625) for liver dysfunction. The AUC value of the total bilirubin (AUC 0.685, 95 % CI 0.546 to 0.825) in predicting early graft dysfunction outperformed other LFTs and was less than CRP (AUC 0.705, CI 0.573 to 0.838).
The optimal cutoff value of total bilirubin obtained from the analysis of ROC curves was 4,5 and surpassed all other parameters with a sensitivity of 94.4% and a specificity of 40.7% respectively for prognoses of EGD (P=0.012). The univariate analysis determined that postoperative neutrophils level and CRP were identified as independent risk factors for early graft dysfunction. Neutrophils had a higher predictive value for liver dysfunction than any other parameter within 24 h (Odds ratio (OR) 16.3; 95% CI: 1.7-156.3, P = 0.016).
Conclusion. Collectively, extracellular histone H3 levels were depressed, total bilirubin and CRP levels were elevated in patients with EGD, which can be used as early predictors for liver tissue damage and early allograft dysfunction in patients after liver transplantation.
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